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1年前
To value time, one should live each day as if it _____ the last day of life. [ ]
1年前
已知关于x的方程x2﹣(2k﹣3)x+k2+1=0有两个不相等的实数根x1、x2. (1)求k的取值范围; (2)若x1、x2满足|x1|+|x2|=2|x1x2|﹣3,求k的值.
1年前
Mum, do you mind my listening to music for a while?
1年前
It is usually warm in my hometown in March, but it _____ be rather cold sometimes.
1年前